The seats in the National Assembly were elected from single member districts, under the first-past-the-post voting system.

The following seats were up for election:[1] The seat from Abra was vacated when incumbent Quintín Paredes was appointed Resident Commissioner to the United States, the Commonwealth of the Philippines's delegate in the United States Congress.

[1] The seat from Ilocos Norte's 2nd district was vacated when assemblyman-elect Julio Nalundasan was shot at his home in Batac just right after the 1935 legislative election.

Ferdinand Marcos, the future president and son of Nalundasan's opponent Mariano, among others, was convicted of murder, but that was reversed on appeal years later.

[2] The seat from Leyte's 4th district was vacated when incumbent Francisco Enage was appointed to be a member of the technical staff at Malacañang Palace.